Gate mechanism



M. KUSHLAN ET AL 37575 GATE MECHANISM Filed Feb. 14. 1921 3 Sheen-Sheet 1 Aug. 2.192;. M. KUSHLAN ET AL 1,637,575

GATE MECHANISM Filed Feb.l4. 1921 3 Shoots-Sheet 2 Aug. 2,1927. 1,637,575 M. KUSHLAN ET AL GATE MECHANI Sll I Patented Aug. 2, 1927. c "i i 'UNITEDffST'ATES PATENT OFFICE.

ntAX KUs LaN; AND Yoime, on oH IoAeo, ILLINOIS; i

earn, vrncnamsm. I

a pneanon area February 14, 1921, sriai No, 444,872.

o i ntionrelates particularly, though accordance with common practice, may be not exclusively, to, gate mechanism provided of the type formed of a framework presentto bemoved, into and out oftraliic-obstructsing at one'fend the end portions12 referred; ing position across roadwayastreets or sideto and tapering toward its opposite en dftov wal'zlksjfis for l at bridgesor railroad a very narrow width, though it will be Crossings, and f a type l'eyingcounter readily understoodthat the invention is apbalancing meansfor the gate arm; our priplicable to a gatearm of any form having inary object being toprovide a construction either a, double connection with the shaft of ting mech nism of the type as shown in the drawings, and hereinbefhre. 10 referred to, wherein the counterbalancing refe ed to, or a single connection only means for the gate arm islenclosed within therewith, the gate arm as, provided, being, the SQ-OZLllGCl' gate-post which involves a adapted to be swung from substantially housingfor the gate-operatingparts, there horizontal position shown in Fig. 1, to bby to avoid the unsightly appearance pro Stantially vertical position, duced by the location of the counterweight c The shaft 10 at the portion thereof within mechanism t i l f f th L}, d erthe casing 9 is provided toward its opposite I mitting of the use of a gate post of such ends with levers l8 and 1t rigidly c v Q character th t it lends itself, to high de; ed therewith, the lever 14 having "an exten -c gree, to its provision in the desired ornas1on15 projecting beyondthe,opposite side, 7

I 20 mental form. Other objects are; toprovide 0f the shaft 10, hi e ten being P V t a comparatively simple and economical conally connectedwith the bifurcated portion struction of gate mechanism and one wh ch 16 of a connecting rod 17 which is provided willfunction in a highly desirable manner. at its lower-end with a deflected portion 18,

H Referringto the accompanying drawings: pivotally connected at 19 to a ,c -a'nl flo fix d Figure 1, is a view in front elevation of a on a shaft 21 journaled in a gear housing I gate; apparatus constructed in accordanc 2 d y Secured i h; Wi s-2 i? h l with'our invention, the gate arm, which is tom of the casing 9 withinpwhich it 1310'.- shown intraflic-obstructing position, being Gated. The shaft 21 has rigidly connected broken away. I Figure 2 is a similar ,view} therewitha worrn-wheel 24 m hi g ith a5 taken at aright angle to the view in Fig." worm 25 ,journaled at its shaft ends 26 in the y 1, and viewing the mechanism from the-right h HSmg 2 0118 f he e shaft ends carryin; the last-referred-to figure, certain parts lng a wormfwheel 27 meshing with a worm of the structure shown being sectioned; 28 fiXedon ashaft 29 journaled in the housk, Figure 3 1s a plan view'of thefstru cture of ing 22 and shown as formingzthe armature F igs, 1 and 2, the upperportion of the ca s; shaft of electric motor 3Q rigidly secured a ing being sectioned. Figure l a broken within ,thecasing '9. The g t ain th c View insectional elevation of a detail of the provided serves as. a means, through the shaft and its support on which the countermedium of whicl'r the power exerted by. the balancing device for the arm is hung. Figmotor 30, is, exerted on the crank 20 to ac- 40 are 5 isa perspective view of the main porltuate the latter for rockingthe shaft 10 and tion of the counterweight employed; and consequently the gate arm In. the partied, Figure 6, a similar View, ofone of a pluralc lar arrangement shown the motor 30 would ity of supplemental sections of thecounten be asreversible motorfor rocking the shaft i ht 10 first in one direction and ,thenjin thelOO 45 I A i usual i tfueturesof this general other, the shaft 21 being moved infeach I characten'thestructure involves a so-called operation, in the particular arrangement gatepost represented at 7, and a gate-arm shown, throughoutsubstant ally l6 5fdegrees. represented at 8' It may be here stated that the provision of -The gate-post? is formed of a housing the worm gearing as described permits of or-casingfi) which may be'of any desirable such wide ratio .of movement between the form, in the upper portion of which a shaft shafts29 and 21 that anelectric motor may 10'is journaled in bearings 11 in opposed be used foroperatlng thegate at the desired side walls vof the casing. The shaft 10 has slow speed, and the gearing occupy s ch a v rigidly connected therewith at its ends, small amountof space that it maybereade end portions lZ-of the gate arm, which, in post,

whi h extend exteriofly fthe casing, the, ily housed within, a relatively small, gates The end of thelever 13 and the end of the lever 14 opposite that at which it is connected with the connecting rod 17, are connected at the pivots 31, with the bifurcated upper ends 32 of connecting rods 33, the lower bifurcated ends 84 of which straddle and are pivotally connected at 35 with links 36, theconnection of these rods with these linksbeing between their ends and the links being pivotal ly connected at 37 with inwardly-extending lugs 38 provided on a wall of the casing 9.

The outer ends of the levers 36 and shown as deflected at 39, are pivotally connected at 40 with the lower ends, respectively, or flexible elements 41 such as chains, as shown, 1 or cables, which extend upwardly from these points of connection and are shown as pass ing over sprockets 42, or it desired'pulleys or bushings, iournaled on a shaft 48 mounted I 1 at its opposite ends 111 opposed walls of the casing 9, the ends of these chains, opposite those conneetedwith the lovers 36', being at tached to the endsot a bar 41 extending transversely through an opening 44 in the main portion of a counterweight 45 located within the casing'9 and supported therein by the chains reterred' to, the shape of the portion 45 of the counterweight being preterably that illustrated. 'By'preference the counterweight also comprises a plurality of relatively lighter sections represented at 46 and of the same shape as the section 45, the

sections 46 being superposed upon each other and upon the section 45 and all of the parts formlng the counterweight being connected 7 together as through the medium of four bolts represented at 47 passing through holes 48 in the various counterweight sections.

The manner of holding the sprockets 42 in properly spaced relation on the shaft 43 is represented'in 4, and involves the provision of end sleeves 49 flanged as indicated at 50 to fit'fiatwise against thesprockets 42, these sleeves being interposed between the sprockets and the adjacent cas ing walls, and an intermediate sleevemember 51 interposed between the two pulleys.

According tothe particular construction shown, the various parts of the'apparatus are in the positions they occupy when the gate arm is in substantially horizontal or, in other words, trafiic-obstructing position, in which position the counterweight is raised as shown. To raise the gate, the motor 30 is operated in adirection to rotate the shaft 21.

i in counter-clockwise directionin Fig. 1 with the result of turning the crank20 in counterclockwise direct on, and through the medium of the connectlng rod' 17 rockmg the shaft 10 in counter clockwise direction and swing-K ing thegate arm to substantially upright position. The tendency of the counterweight referred to is'to rock the levers 36 upwardly in clockwise direction in Fig. 1 and through V the medium of the connecting rods 33 exert acter.

a force against the levers 14 tending to rock.

them upwardly in anti-clockwise direction,

'the counterweight referred to being preterably of such weightthat it w1ll substantially counterbalance the weight of the gate arm '8 thereby to permitof the operation ofthe gate with the minimum power and permit of its smooth operation. The motor 80 may be controlled in any desirable manner, such as is commonly the practice in the case of gate mechanism, it being common practice to provide in connection with such apparatus, a limit electric switch controlled by the rotation of the shattlO and operating when the shaft reaches a certain position in its rotation in either direction, to automaticallyshut' off the current to the motor. As such mechanisms are common and well known it is not deemed necessary to illustrate the same; It may, however, be stated that in the particular arrangement shown the crank 20 in the gate-raising operation would rotate from the position shown in Fig. 1 and in anti-clock wise direction, substantially throughout 165 rendered substantially proportionate to the varying leverage exerted by the gate arm as stated, we provide between the shaft 10 and thecounterweight, the'lever connections as shown, it being apparent from the showing that as the gate nears uprightposition, thecounterweight, by reason of the mechanismas stated, exerts a decreasing force tendingto lift the gate. V

Furthermore, it will be noted, that by rea son of the arrangement of the parts as shown,the nioven'ient oi the gate will be slower at the beginning and the ending of its increments in both directions, than during itsinterinediate travel, which is a desirable feature in structures of this char- The casing is shown as provided with removable closures 52 and 53, the former located in aside wall adjacent the counterweightiorclosing an opening 54' through which certain partsiof the mechanism in, I the'casing are accessible,- and the latter c105 in -m1 opening 55 throughwhich the motor i and! ear mechanismmay be introduced into, and it-hdrawn from, the casing for instal-lation'and repair or replacemenn'it desired, the motor togeth'er'with the gear mechanism referred to being preferably mounted on a removable base permitting these mechanisms to be introduced into the casing and re moved therefrom, as a unit. i

It will be readilyunderstood from the foregoing that by constructing the appa'ztus in accordance with our invention, the counterweight mechanism is concealed from View, and the gate-p0st may be provided as a highly ornamental structure.

While we have illustrated and described a particular construction embodying our invention, we do not wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of our invention; i

What we claim as new, cure by Letters Patent, is:

1.1n mechanism of the character set forth, the combination of a casing, agate arm pivotally connected therewith, means for operating said gate arm, a counterweight, a rod operatively connected with said gate arm eccentrically of its pivot, a

and desire to selever pivotally supported at one end and connected between its ends with said rod, and a connection between said lever at its outer end and sald counterweight.

2.111 mechanism of the character set forth, the combination of a casing, a gate arm --pivotally connected therewith, means for operating said gate arm, a counterweight, a rod operatively connected With operating said gate arm, a counterweight, a member on said shaft, a rod pivoted to sald member, a pivotally-supported lever extending in a olirection opposite to said member, a rod pivotally connecting said member and lever, the engagement of said rod with said lever I being between the pivotal support thereof and outer end, a counterweight, asupport, and a flexible element extending over said support and connected with said coui'iterweight and the outer end of said lever.

, MAX KUSHLAN.

HUGH n, YOUNG. I y 

